Counting Days So Far This Year..

Is there a better way to do this? Is there a way to calculate business days.

<?php
if( function_exists( 'date_default_timezone_set' ) )
{
// Set the default timezone to US/Eastern
date_default_timezone_set( 'US/Eastern' );
}
// Will return the number of days between the two dates passed in
function count_days( $a, $b )
{
// First we need to break these dates into their constituent parts:
$gd_a = getdate( $a );
$gd_b = getdate( $b );
// Now recreate these timestamps, based upon noon on each day
// The specific time doesn't matter but it must be the same each day
$a_new = mktime( 12, 0, 0, $gd_a['mon'], $gd_a['mday'], $gd_a['year'] );
$b_new = mktime( 12, 0, 0, $gd_b['mon'], $gd_b['mday'], $gd_b['year'] );
// Subtract these two numbers and divide by the number of seconds in a
// day. Round the result since crossing over a daylight savings time
// barrier will cause this time to be off by an hour or two.
return round( abs( $a_new - $b_new ) / 86400 );
}
// Prepare a few dates
$date1 = strtotime( '1/01/2008 12:01am' );
$date2 = strtotime( '10/01/2008 8:36pm' );
$dayspassed = count_days($date1, $date2);
echo $dayspassed;
?>

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